Here is the changelog (I forgot to put dates on a couple entries in the readme):

Changes in release 4 (June 3, 2010):-Lowered the default gamma slightly. I feel the textures look better when the gamma is not turned up all the way.-Renamed "Other Info" player setup field to "RPG password", when run as rpg mod.-Changed console.cs to make command line parameters less strict (-dedicated no longer needs to be on the end).-Added numpad key-bindings, for repack-compatible servers (the bindings are configured per-server).-Hackfix 1.7.5 (small changes just for this new repack)

Changes in release 3 (March 22, 2010):-Added War40k mod and some additional skins for other mods.-Added a few other client side shape files.-Worked around a bug that caused "REFRESH ALL" to take a long time.-Hackfix 1.7.4 (small aesthetic changes)-Repack will now stop accessing the sound device on startup if all sound volume options are turned down/disabled in options. It will still reopen sound on opening the options tab.-Small changes to client files and defaults.-Copied a few shapes and skins from SWRPG to RPG.

Also, on my main Tribes server, recent changes are as follows:
-Added server side support for the numpad key bindings
-Changed weight of coins from a small negative amount, to nothing -- fixing an exploit that allowed you to keep dropping and picking up your coins again to lower your weight for no apparent reason
-The following inventory items have been moved to belt: Black Statue, Dragon Scale, Enchanted Stone, Skeleton Bone

As a bit of trivia, there are now 77 keys that can be #set on my main server with the latest repack.